JP3518742B2 - Joint structure of truss structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure for a truss structure, and more particularly to a joint structure for a truss structure that simplifies the assembling and installing operations of the truss structure and can perform these operations safely.

[0002]

2. Description of the Related Art As a skeletal structure for bridges, buildings, plant equipment, etc., a truss structure has been widely put into practical use. For example, in a frame structure of a plant facility installed in a horizontal direction, as shown in FIG. 4 , an upper chord member 50, a lower chord member 51, and a plurality of lattice members 52 connecting the upper chord member 50 and the lower chord member 51 to each other. A truss structure 53
A truss structure 53 is constructed by sequentially mounting a plurality of truss structure blocks 54 and connecting them in series.

The longitudinal position (horizontal position in FIG. 4 ) of the joint of the upper chord member 50 of each truss structure block 54 is arranged at the same position as the longitudinal position of the joint of the lower chord member 51 of the same truss structure block 54. . The upper chord member 50 of each truss structure block 54 has, for example, a cut surface having an H-shaped section cut in advance in the vertical direction, and the both ends of the lower chord member 51 also have, for example, a cross section cut in advance in the vertical direction. Each H-shaped cut surface is formed.

The upper and lower surfaces of the upper chord member 50 of the joint are
A pair of attachment plates 55 are provided on both ends of the upper chord member 50 and are connected by bolts. Upper chord material 5
On the left side surface and the right side surface of 0, a pair of attachment plates 56 are provided on the upper chord member 50.
Are provided on both ends of each and are connected by bolts. The joint of the lower chord member 51 is also provided with a similar pair of attachment plates 55 and a pair of attachment plates 56. Upper chord material 5
0 and the lower chord member 51 are generally H-shaped steel, grooved steel, equilateral angle steel, etc., and the lattice member 52 is generally equilateral angle steel.

When the truss structure block 54 is connected, it may be connected from one end of the frame to the other end or from both ends of the frame to the center in the length direction. The truss structure block 54 is hung by a crane, and the upper chord member 50 and the lower chord member 51 of the truss structure block 54, which are mounted in order, are mounted to the upper chord member 50 and the lower chord member of the truss structure block 54, which are mounted in the later order. After positioning the block joints of the material 51 in a butt shape, the two attachment plates 55 and the two attachment plates 56 are connected to each other.

[0006]

[Problems to be Solved by the Invention] With a large truss structure such as a bridge or plant equipment, it is impossible to integrally assemble and transport a plurality of truss structure blocks at a factory. They must be transported to and assembled (installed). At this time, it is necessary to position the joint position of the truss structure block having the later mounting sequence with the crane with respect to the truss structure block having the earlier mounting sequence.

At the time of operating the crane, the truss structure block after the above is gradually lowered from the upper position to position the block.
There is a possibility that the upper chord material of the truss structure block will interfere with the lower chord material of the truss structure block due to the influence of the inertial force and wind of the truss structure block. There may be a displacement until the bolts are connected.

As described above, since the positioning of the truss structure block is difficult and unstable, not only the working time of the crane and working time at high places become long, but also the work efficiency of assembling and installing work becomes poor. An object of the present invention is to simplify the assembling and installing work of a joint structure of a truss structure, improve its work efficiency and safety, and the like.

[0009]

A joint structure of a truss structure according to claim 1 is a truss structure composed of an upper chord member, a lower chord member, and a plurality of lattice members connecting the upper chord member and the lower chord member. In a truss structure in which truss structure blocks are sequentially mounted and connected in series, the joint position of the upper chord member of the truss structure block whose mounting order is later than that of the truss structure block whose mounting order is The joint shape of the lower chord member is placed on the truss structure block side earlier than the joint position, and the joint shape of the block joint of the upper chord member and the lower chord member is set to the truss structure block earlier in the mounting order. The truss structure block of the above is formed so that it can be received from the lower side, and
Each of the chord block joints is a truss structure that is installed first.
Welded to the upper or lower chord end of the building block
Stepped locking plate and stepped shape connected to this locking plate
Of the truss structure block that is the locking plate of the
A stepped member welded to the end of the upper or lower chord
Yes and stop plate, and a plurality of bolts connecting the front Symbol both locking plate
It is characterized by doing.

When connecting a plurality of truss structure blocks on site, the truss structure blocks are hung by a crane, and the mounting order is set with respect to the joint position of the upper chord member and the lower chord member of the truss structure block which is earlier in mounting order. Positions the joints of the upper and lower chord members of the subsequent truss structure block in a butt shape.

At this time, the joint position of the upper chord member of the truss structure block whose mounting sequence is later than the joint position of the lower chord member of this truss structure block is located on the truss structure block side of the truss structure block whose mounting sequence is earlier. Since they are arranged in a staggered manner, the lower chord members of the latter truss structure block are prevented as much as possible from interfering with the upper chord members of the previous truss structure block when the latter truss structure block is gradually lowered from above by the crane operation. can do.

Since the joint shape of the block joint of the upper chord member and the lower chord member is formed so that the truss structure block having the first mounting order can receive the truss structure block having the latter mounting order from the lower side, the block joint to be connected is formed. Can be temporarily fixed. At least the vertical displacement of the block joint can be prevented, and the block joint can be positioned easily.

Each of the block joints of the upper chord member and the lower chord member
Is the upper chord member or the lower chord member of the truss structure block that is installed first.
With a stepped locking plate welded to the end of the chord,
Stepped locking plate connected to the locking plate
At the end of the upper or lower chord of the truss structure block
Welded stepped locking plate and both locking plates
Has a plurality of bolts for coupling, engages shaped with the stages
The stop plate simplifies the positioning of the block joints to be connected, and the truss structure block having the earlier mounting sequence can reliably receive the truss structure block having the later mounting sequence from the lower side.

[0014]

In the joint structure of the truss structure of claim 2 , in the invention of claim 1, an attachment plate for supporting the adjacent upper chord member and lower chord member is provided in advance on one side of the adjacent upper chord member and lower chord member. It is characterized by that. The joint shape of the block joint of the upper chord member and the lower chord member can be simplified, and the conventional one can be used in common.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. The present embodiment is an example of a case where the joint structure of the truss structure of the present invention is applied to a steel truss structure of a frame of a plant facility installed in a horizontal direction. However, the longitudinal direction of the truss structure shown in FIG. 1 is defined as the left-right direction in the description. As shown in FIGS. 1 and 2, the frame 1 is composed of an upper chord member 2, a lower chord member 3, a lattice member 4, etc., and has a structure in which a plurality of truss structure blocks 5 are sequentially mounted and connected in series. ing. An intermediate part in the length direction of the frame 1 is supported by the upper ends of a plurality of leg members 6, and a pipeline or the like is laid on the upper chord member 2.

Explaining the upper chord member 2 and the lower chord member 3,
As shown in FIG. 2, in each truss structure block 5, the upper chord member 2 and the lower chord member 3 are parallel to each other at a predetermined interval in the vertical direction.
In the left-right direction. The upper chord member 2 and the lower chord member 3 are each formed of H-shaped steel having an H-shaped cross section, and a plurality of brackets 7 are provided on the lower flange of the upper chord member 2 and the upper flange of the lower chord member 3 at regular intervals and in a facing manner. Are attached respectively.

Next, the lattice member 4 will be described. A plurality of lattice members 4 for connecting the upper chord member 2 and the lower chord member 3 are provided. As the lattice member 4, the vertical lattice 8 standing vertically and the vertical direction. There is a tilt lattice 9 having a tilt angle. The standing lattices 8 and the inclined lattices 9 are alternately arranged in the longitudinal direction, and the upper chord member 2 and the lower chord member 3 are connected to each other via the bracket 7.

Next, the joint structure will be described. 2,
As shown in FIG. 3, the block joint 13 includes a joint 20 of the upper chord member 2 and a joint 21 of the lower chord member 3.
The upper chord member 2 of the truss structure block 5B (hereinafter referred to as the rear block 5B) whose mounting order is later than the truss structure block 5A (hereinafter referred to as the former block 5A) which is first mounted.
The position of the joint 20 is shifted from the position of the joint 21 of the lower chord member 3 of the block 5B toward the front block 5A by a predetermined distance δ.

Since the joint 20 and the joint 21 have the same structure, only the structure of the joint 20 of the upper chord member 2 will be described in detail below. As shown in FIG. 3, a locking plate 22 having the same width as the flange is welded and joined to the right end of the upper chord member 2 of the rear block 5B.
And a horizontally oriented locking portion 11 connected to the lower end of the upper half portion 10 and a vertically oriented lower half portion 12 connected to the left end of the locking portion 11. That is, the upper half portion 10 is disposed on the side of the block 5A ahead of the lower half portion 12, and is formed in a stepped shape.

A locking plate 23 having substantially the same width as the flange is welded to the left end of the upper chord member 2 of the front block 5A, and this locking plate 23 causes the locking plate 22 of the rear block 5B to come from below. The structure is such that both the locking plates 22 and 23 are coupled by a plurality of bolts while being received and the locking plate 22 being in contact with the locking plate 23. Upper chord material 2 of the joint 20
On the upper surface and the lower surface, a pair of attachment plates 14 are provided on both ends, respectively, and are connected by bolts. Incidentally, the joint 21
On the upper surface and the lower surface of the lower chord member 3, a pair of attachment plates 15 are provided at both end portions and connected by bolts.

Next, the operation of the joint structure of the truss structure described above will be described. As shown in FIGS. 1 and 2, when connecting a plurality of truss structure blocks 5 on site,
The truss structure block 5B is suspended by a crane (not shown), and the mounting order is the upper chord member 2 and the lower chord member 3 of the first block 5A.
The joint position of the upper chord member 2 and the lower chord member 3 of the rear block 5B is positioned so as to abut with respect to the joint position of. However, the inclined lattice 9 between the truss structure blocks 5A and 5B is previously removed so that it can be connected later.

At this time, the position of the joint 20 of the upper chord member 2 of the rear block 5B is displaced from the front block 5A by a predetermined distance δ from the position of the joint 21 of the lower chord member 3 of the truss structure block 5B toward the front block 5A. Since the rear block 5B is gradually lowered from above by the crane operation, it is possible to prevent the lower chord member 3 of the rear block 5B from interfering with the upper chord member 2 of the front block 5A.

After that, the locking plate 23 of the front block 5A receives the locking plate 22 of the rear block 5B from the lower side, and the locking plate 23 is brought into contact with the locking plate 23.
2 and 23 are connected by a plurality of bolts, and the attachment plate 1
Connect bolts 4 and 15 respectively. After that, the inclined lattice 9 that has been removed in advance is bolted. Hereinafter, similarly, a plurality of truss structure blocks 5 are sequentially connected.

According to the joint structure described above, the stepped joint shape allows the front block 5A to reliably receive the rear block 5B from below, so that the block joint 13 to be connected is temporarily fixed. be able to. At least displacement of the block joint 13 in the vertical direction can be prevented, and the positioning of the block joint 13 is simplified. As described above, since the positioning of the block joint 13 to be connected is simplified and stabilized, the working time of the crane and the working time at high places can be shortened, and the work efficiency of the assembly and installation work is improved.

[0026]

[0027]

[0028]

[0029]

[0030] Here, upper chord member and the lower chord member is not necessarily to be formed in the H-beams can be formed groove-shaped steel, equilateral Angle iron or the like. When connecting the truss structure blocks, the joint structure of the truss structure of the present invention is used in both cases of connecting from one end side of the frame to the other end side and connecting from both end sides of the frame to the longitudinal center side. Applicable. The joint structure of the truss structure of the present invention can be applied to the truss structure of bridges and other buildings other than the frame of the plant equipment. Besides, it is also possible to carry out the embodiment in which various modifications are added to the embodiment without departing from the spirit of the invention.

[0031]

According to the invention of claim 1, the joint position of the upper chord member of the truss structure block whose mounting order is later is set to the joint position of the lower chord member of this truss structure block with respect to the truss structure block whose mounting order is earlier. Since the truss structure block is located at a position ahead of the position, when the latter truss structure block is gradually lowered from above by the crane operation, the lower chord material of the latter truss structure block is the upper chord of the former truss structure block. Interference with the material can be prevented as much as possible.

Since the joint shape of the block joint of the upper chord member and the lower chord member is formed so that the truss structure block having the first mounting order can receive the truss structure block having the second mounting order from the lower side, the block joint to be connected is connected. Can be temporarily fixed. At least the vertical displacement of the block joint can be prevented, and the block joint can be positioned easily. As described above, since the positioning of the block joints to be connected is simplified and stabilized, it is possible to reduce the use time of the crane and the work time at high places, and the work efficiency of the assembly and installation work is improved.

For each block joint of the upper and lower chord members
Of the upper chord member or lower chord member of the truss structure block installed first
A stepped locking plate welded to the end and a rear end
Welded to the end of the upper chord or lower chord of the truss structure block.
The combined stepped locking plates can reliably receive the truss structure block having the later mounting sequence from the lower side by the truss structure block having the earlier mounting sequence .

According to the second aspect of the present invention, the joint shape of the block joint of the upper chord member and the lower chord member can be simplified, and the conventional joint can be used. In addition, the same effect as that of the first aspect is provided.

[Brief description of drawings]

FIG. 1 is a front view of a frame according to an embodiment of the present invention.

FIG. 2 is a partial front view of a main part of the truss structure.

FIG. 3 is an enlarged front view showing the joint structure of the truss structure .

FIG. 4 is a partial front view of a conventional truss structure.

[Explanation of symbols]1 frame 2 upper chord material 3 Lower chord material 4 Lattice material 5,5A, 5B      Truss structure block 13 block fittings 16 side plate 20,21 joint

─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-6-146406 (JP, A) JP-A-49-8040 (JP, A) JP-A-5-331910 (JP, A) JP-A-8- 239909 (JP, A) JP 53-43906 (JP, A) Actually developed 53-101685 (JP, U) JP-B 7-54022 (JP, B2) (58) Fields investigated (Int.Cl. ⁷ , DB name) E04C 3/00-3/46 E04B 1/58 503

Claims (2)

(57) [Claims] 1. An upper chord member, a lower chord member, and an upper chord member and a lower chord member.
It is a truss structure consisting of multiple lattice materials that connect
Serially mount multiple truss structure blocks
In the connected truss structure, Compared to the truss structure block whose mounting order is earlier, the mounting order is
The joint position of the upper chord member of the truss structure block after
The mounting order precedes the joint position of the lower chord member of the lath structure block.
While arranging it on the truss structure block side of Equipped with the joint shape of the block joint of the upper chord material and the lower chord material,
The truss structural block that is first in the sequence
Formed to receive the truss structural block from below
ThenEach of the block joints of the upper chord member and the lower chord member is mounted in the order of mounting.
At the end of the upper or lower chord of the truss structure block
Welded stepped locking plate and connected to this locking plate
Truss with stepped locking plate that is installed later
Welded to the upper or lower chord end of the structural block
Stepped locking plate and a plurality of connecting both locking plates
With bolts, A joint structure of a truss structure, which is characterized in that 2. The truss structure according to claim 1, wherein an attachment plate for supporting the upper chord member and the lower chord member adjacent to each other is provided in advance on one side of the upper chord member and the lower chord member adjacent to each other. Joint structure.